A. | do | B. | did | C. | have been doing | D. | had done |
分析 为了找到那个丢失的男孩,在过去的24个小时里,这对年轻的夫妇倾其所能.
解答 答案为C.根据时间状语"over the past twenty-four hours"可知寻找这个动作从过去一直持续到现在,而"In order to find the missing boy"可知这个男孩还没有找到.所以答案是C,表示从过去一直到现在且现在还在进行.
点评 考查现在完成进行时.
现在完成进行时,是英语中,动词的一种基本时态,其构成为:主语+助动词(have/has)+been+动词的现在分词+其他成分.表示动作从某一时间开始,一直持续到现在,或者刚刚终止,或者可能仍然要继续下去.(与since,for连用时,要用连续性动词,不可用瞬间动词,但连续性动词常常表示动作会进行下去)
也可以表示某种经历.
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